Ibrahim Saud
@tektrixIndiaCompletionist
2 followers18,457 downloads7,054 copies47 likes38,395 views
11,679 detections
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Detects the post-encryption cleanup routine where Nightspire utilizes wevtutil to clear Security, System, and Application event logs to hinder incident response efforts. This rule specifically looks for the execution of 'wevtutil.exe' with the 'cl' (clear log) command targeting 'System', 'Security', or 'Application' event logs, and correlates it with the presence of files ending with '.nightspire' on the same device.
Detects a user navigating to the Microsoft devicelogin portal immediately after clicking a link from an email, a precursor to Device Code OAuth phishing.
Identifies regsvr32.exe utilizing scrobj.dll to execute a remotely hosted malicious COM script.
Detects the execution of a local, polymorphic HTML file that contains AI-obfuscated JavaScript, followed by an HTTP POST request to an external server within a 5-minute window, indicating potential credential exfiltration.
Detects a network beacon triggered strictly during model initialization. If a Python process loads a model file and immediately establishes an outbound TCP connection to an unknown IP, it indicates an embedded payload phoning home.
Detects web service accounts (e.g., www-data) unexpectedly spawning shells from FFmpeg. This behavior is strongly indicative of remote code execution (RCE) via the PixelSmash vulnerability, specifically targeting automated preview generation in platforms like Nextcloud.
Detects web service accounts (e.g., www-data) unexpectedly spawning shells or scripting interpreters from FFmpeg. This behavior is strongly indicative of remote code execution (RCE) via the PixelSmash vulnerability, specifically targeting automated preview generation in platforms like Nextcloud.
Detects Jellyfin's automated ffprobe media scan pipeline spawning suspicious network-related shell commands. This indicates active exploitation of the PixelSmash vulnerability (CVE-2026-8461) via zero-click library scans.
Identifies attackers renaming the ClickOnce executable (dfsvc.exe) to bypass basic AppLocker path rules. This rule specifically looks for instances where the original file name is 'dfsvc.exe' but the current file name is different, indicating a rename.
Detects instances where FFmpeg media processing tools (ffmpeg, ffprobe, ffmpegthumbnailer) spawn interactive shell processes (bash, sh, dash, zsh, cmd.exe, powershell.exe, pwsh.exe). This behavior is highly indicative of successful remote code execution (RCE) via CVE-2026-8461 (PixelSmash), where an attacker hijacks the AVBuffer struct to call libc's system() function.
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